CA1322178C - Controlled rate adsorbent unit and method of fabrication thereof - Google Patents

Controlled rate adsorbent unit and method of fabrication thereof

Info

Publication number
CA1322178C
CA1322178C CA000611884A CA611884A CA1322178C CA 1322178 C CA1322178 C CA 1322178C CA 000611884 A CA000611884 A CA 000611884A CA 611884 A CA611884 A CA 611884A CA 1322178 C CA1322178 C CA 1322178C
Authority
CA
Canada
Prior art keywords
adsorbent
controlled rate
adsorbent unit
package
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA000611884A
Other languages
French (fr)
Inventor
John S. Cullen
Samuel A. Incorvia
Christopher S. Nigon
Nicholas E. Vaylen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multisorb Technologies Inc
Original Assignee
Multiform Desiccants Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Multiform Desiccants Inc filed Critical Multiform Desiccants Inc
Application granted granted Critical
Publication of CA1322178C publication Critical patent/CA1322178C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0454—Controlling adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/266—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants
    • B65D81/268—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants the absorber being enclosed in a small pack, e.g. bag, included in the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
    • B01D2253/1124—Metal oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40084—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by exchanging used adsorbents with fresh adsorbents

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Drying Of Gases (AREA)
  • Packages (AREA)

Abstract

CONTROLLED RATE ADSORBENT UNIT
AND METHOD OF FABRICATION THEREOF

ABSTRACT OF THE DISCLOSURE
A controlled rate adsorbent unit including an adsorbent and a heat-shrunk casing of porous material having a predetermined water vapor transmission rate encasing the adsorbent for prolonging the water vapor adsorption time of the adsorbent. The controlled rate adsorbent unit may be in the shape of a recording disc or it may be in the shape of a three-dimensional solid with the heat-shrunk casing stretched tightly thereover. A method of fabricating a controlled rate adsorbent unit including the steps of providing an adsorbent material, heating the adsorbent material to dry off moisture therefrom, providing a porous material having a controlled water vapor transmission rate, sealing the adsorbent material in a casing of the porous material, heat-shrinking the porous material about the adsorbent, and storing the sealed adsorbent material in a moisture barrier package.

Description

`~ ~ 3 ~ 2 ~

The present invention relates to a controlled rate adsorbent unit and to a method of fabrication thereof~
By way of background, the ability of recording discs of various types to record and play baclc accurately may be affected by moisture accumulating thereon during storage.
Furthermore, it ls desirable that any water vapor adsorbents which are used to maintain the discs in a relatively dry state should have certain features which enhance their utility. Also there may be situations where gases other than water vapor have lQ to be adsorbed at a controlled rate.
It is accordingly one important object of the present invention to provide an improved controlled rate adsorbent unit which is approximately the size of a recording disc so that it can be packaged therewith; which has a controlled rate of water vapor adsorption so that it has a relatively long effective ~
life; which confines any adsorbent dust therein to thereby ~-prevent it from being deposited on the recording discs with ~hich it is stored; and which may have a humidity indicator incorporated thereon for showing its condition.
Another object of the present invention is to provide an improved controlled rate adsorbent unit having a predeter-mined shape and which is encased in a conforming casing, the latter providing the controlled rate of vapor transmission to the adsorbent contained therein and which, by virtue of its conforming casing, provides a neat package.
A further object of the present invention is ~o provide a method for fabricating an adsorbent which will adsorb vapor at a controlled rate. Other objects and attendant advantages of the present invention will readily be perceived hereafter.

a~`

~2~78 The present invention rela~es to a controlled rate adsorbent unit for placement into a recording disc package in which recording discs are being stored comprising a sheet of paper impregnated with a moisture adsorbent, and plastic film casing means of porous material conforming to and completely encasing said sheet of paper and sealing said sheet of paper therein, said casing means having a predetermined water vapor transmission rate for controlling the water vapor adsorption rate of said moisture adsorbent so that exposure of said controlled rate adsorben~ unit to high humidity atmospheric conditions will not prevent said adsorbent unit from remaining active for prolonged periods of time, and said adsorbent unit being substantially in the shape of a recording disc. ^
The present invention also relates to the combina-tion of a package, recording disc means in said package, and a controlled rate adsorbent unit in said package for adsorbing water vapor in said package at a controlled rate for maintaining the quality of said recording disc means, said controlled rate adsorbent unit being in the shape of a recording disc, said adsorbent unit including paper impregnated with a ~oisture adsorbent and completely encased and sealed within a plastic ~;
casing having a predetermined vapor transmission rate.
The present invention also relates to a method of fabricating a controlled rate adsorbent unit in the shape of a recording disc with which it is to be packaged comprising the steps of providing an adsorbent material consisting of paper impregnated with a moisture adsorbent and having a predetermined planar shape, heating said adsorbent material to drive off moisture therefrom, providing a plastic porous material having a controlled water vapor transmission rate, and conforming said plastic porous material to said predetermined planar shape and in completely sealed relationship thereto to produce said controlled rate adsorbent unit.
The various aspects of the present invention will be more fully understood when the following portions of the specification are read in conjunction with the accompanying drawings wherein: :

FIG. 1 is a perspective view, partially broken away, of a package containing a plurality of floppy discs and a controlled rate adsorbent unit in the shape of a diskette for adsorbing water vapor within the package;
FIG. 2 is a plan view of the controlled rate adsorbent unit of the present invention;
FIG. 3 is a fragmentary cross sectional view taken substantially along line 3-3 of FIG. 2;
FIG. 4 is a fragmentary cross sectional view taken substantially along line 4-4 of FI~. 2;
FIGS. 5-12 depict the progressive steps which comprise the method of fabricating the controlled rate adsorbent unit of ~IG. 2; and FIGS. 13-15 depict the steps in the method of providing a controlled rate adsorbent unit of a three-dimensional shape rather than the planar shape of FIGS. 5-12.
f The controlled rate adsorbent unit 10 of the present invention is for installation within package 11 containing one or more recording discs 12 which may be floppy discs, hard discs, compact discs or any other medium, the recording quality or play-back quality of which may be affected by moisture. It is the purpose of the controlled rate adsorbent unit 10 to remove the moisture from the package 11 at a controlled rate.
Package 11 essentially includes two telescoping hollow rectangular parts/ namely, inner part 13 and outer part 1~.
The bottom of outer part 1~ is open to receive inner part 13, the top of which is open to receive recording discs 12 and adsorbent unit 10. Package 10 may be fabricated of vapor barrier material, and, if this is the case, the useful life of unit 10 may be extended, as the adsorbent unit 10 then need only ~ ~22~8 adsorb moisture trapped inside of package 11 as a result of opening and closing it.
The controlled rate adsorbent unit 10 includes a sheet of desiccant paper 15 which is commercially available and which contains cellulose fiber with approximately two-thirds fine particles of dry silica gel desiccant. One side of paper 15 is printed at 17 with a humidity indicating substance, ~' namely, cobalt chloride, which is confined within the black printed circle ~9. Cobalt chloride is blue when the desiccant paper 15 is dry and turns pink when the desiccant paper 15 has adsorbed a predetermined amount of moisture. Also printed on paper 15 is a blue bar 20 within black outline 21. Blue bar 20 is strictly for providing a comparison for the cobalt chloride circle 17. The legend "Desiccant active if spot matches panel or is a darker shade of blue" is printed below panel 20. The use of the foreyoing scheme for humidity indication is well known and by itself does not constitute a novel part of the present invention. While the unit 10 has been depicted with the humidity indicating material printed thereon, it will be appreciated that it need not be used, that is, the unit 10 can be used without it. In this event a separate humidity indi-cating card may be used in the package, if humidity indication is required or desired. A desiccant paper 15, which has been found satisfactory, is known under the trademark NATRASORB~
SG-145, and is 54 mils thick and contains 44 grams of silica gel per square foot. However, any desired thickness of paper containing any desired amount of adsorbent or desiccant can be used, depending on requirements for its use. ~-A casing 23 confines a sheet of desiccant paper 15 therein. Casing 23, in the present instance, is a polyvinyl chloride filrn which has been shrunk-wrapped around desiccant paper 15. More specifically, casing 23 is fabricated by folding it along edge 24 and heat-sealing the remainlng edges 25 to each other to thereby completely confine the desiccant paper 15 within casing 23. The PVC, after edges 25 have been sealed, is heat-shrunk to provide an extremely smooth surface to both sides of the controlled rate adsorbent 10. The casing 23 prevents dust from the silica gel from passing out of the casing and ;~
reaching the recording discs. If desired, a plurality of sheets of desiccant paper can be placed within a casing, to thereby increase the vapor adsorbing capacity of the unit 10.
The polyvinyl chloride casing 23 can have a broad range of vapor transmission, namely, 5 to 15 grams of water -~
vapor per hundred square inches per day. The polyvinyl chloride may be of any desired thickness to obtain the desired rate o water vapor transmission. In the specific example shown, it is 50 gauge, but it can be up to 150 gauge, or, in fact, any ~-thicknessl depending on the desired rate of vapor transmission.
The controlled rate of vapor transmission extends the shelf life of the adsorbent paper compared to the shelf life which would be obtained in the absence of the controlled rate. Thus, the adsorbent unit 10 can effectively dehumidify the package of discs in which it is placed. It will not lose its potency rapidly even i i~ is placed in an extremely humid environment.
The controlled rate adsorbent unit lQ is thus low profile for convenient installation in package 11. It is non-dusting so as not to adversely affect the recording media 12. In this respect, the casing 23 confines any dust from the dessicant. It is indicating to show its condition, namely, whether it is active or whether it is saturated with water. It ~22~7~

adsorbs water vapor at a controlled rate to thereby not only prevent moisture from adversely affecting the recording media 12 but also to remain active for a relatively long time regardless of being placed in extremely humid environments. The controlled rate adsorbent unit 1~ will remain active for approximately four weeks regardless of being placed in a hi~h humidity environment.
When the recording discs are placed in a package, such as 11, the latter will provide a certain barrler to transmission of wa~er vapor to its inside, and thus the adsorbent unit 10 will only be subjected to the amount of water vapor within the package, which will result in an even longer life of the unit.
While the adsorbent paper has been described as ~
containing silica gel, it will be appreciated that it can --contain any suitable adsorbent, such as molecular sieve, clay, :
~, or calcium sulfate, by way of example and not of limitation. --Furthermore, while the casing 15 has been described as polyvinyl chloride, it will be appreciated that it can be any type of film which has a desired vapor transmission rate, and it may include, without limitation, vinylidene chloride copolymer films, ; 20 polystyrene, polypropylene or polyethylene terephthalate. Also, the casin~ may be material whlch has been microperforated, with the microperforations being of any desired size, and the term porous includes such structure. ~ -The method of fabricating the specific controlled rate adsorbent unit 10 is depicted in FIGS. 5-12. The first step is to cut a piece of adsorbent paper 15 to size, as shown in FIG. 5. Thereafter, it is imprinted with the humidity indicator cobalt chloride 17 and the reference panel 20 as described above, as shown in FIG. 6. The next step is to subject the desiccant paper 15 to a heat source 27, as shown in FIG. 7, to ~2~

dry it out. Normally this process comprises heatiny desiccant paper 15 for three hours at 300 F., but any other suitable drying procedure can be used. If the dried desiccant paper 15 is not to be immediately encased, it is then stored in a moisture barrier container 29 until it is needed, as shown in FIG. 8. In the foregoiny respect, a plurality of dried desiccant papers 15 are stored within barrier container 29.
The next step in the process is to encase desiccant paper 15 within casing 23 by heat sealing opposite sides of the 10 casing at heat sealed edges 25 after it has been folded along edge 24. Thereafter, the controlled rate adsorbent unit 10 is completed by heat-shrinking casing 23 by subjecting it to heat from source 30. This causes the casing 23 to substantially follow the contour of paper 15 substantially exactly and to cause unit 10 to have smooth glossy sides. Thereafter, unit 10 is stored in a vapor-barrier container 31~ as shown in FIG. ll until it is ready for final packaging. In this respect, a plurality of units 10 can be stored within container 31 which prevents moisture from reaching the finished unit 10. There-20 after, one or more controlled rate adsorbent units 10 arepackaged within a barrier package 32 which may be metal foil or any other packaging material which will prevent moisture from reaching unit 10. Barrier container 32 may be the type which can be opened as required to remove one or more units 10.
In FIGS. 13-15 another type of controlled rate adsorbent unit 101 is disclosed. Unit 10' includes a solid three-dimensional adsorbent 33 which may be compressed molecular sieve which is encased in a heat-shrunk casing 34 of polyvinyl chloride, as described above, or any other suitable material 30 which will provide a controlled rate of water vapor or gas ~322:1 ~8 transmission. In order to fabricate unit 10', two sheets 35 of polyvinyl chloride are placed on opposite sides of adsorbent 33 and thereafter they are heat sealed to each other along an edge 37. Thereafter, the package o FIG. 14 is subjected to heat to -heat-shrink casing 34 so that it provides a tight wrap about adsorbent 33.
Whlle the preferred manner of forming the controlled ~ rate vapor transmitting casing described above in all embodi--~ ments is by heat shrinking, it will be appreciated that other ~ 10 methods of applying the conformi~ng casing may be used as by J, stretch wrapping and shrink wrapping by methods other than heating. Also, where the geometry of the adsorbent permits, the :, , controlled vapor transmission casing can be applied in ; conforming relationship to the adsorbent in any suitable manner ., ~.
While the adsorbent described above has been in the ` nature of a deslccant to adsorb water vapor from an environment ~ at a controlled rate, it will be appreciated that the adsorbent ; can be of any desired adsorbent compound for adsorbing any undesirable gaseous or vaporous substance, and as noted above, it may be by way of example and not of limitation, carbon, potassium permanganate~ ferrous salts/oxides, calcium and sodium ~`~
hydroxides, or mixtures of suitable compounds. It will also be ;~
appreciated that in the claims the terminology vapor or vaporous substance includes any gas or vapor, and the only time that the claims are limited to water vapor is when this is specifically recited.
While preferred embodiments of the present invention have been disclosed, it will be appreciated that the present invention is not limited thereto but may be otherwise embodied within the scope of the following claims.
'' :

,

Claims (8)

1. A method of fabricating a controlled rate adsorbent unit in the shape of a recording disc with which it is to be packaged comprising the steps of providing an adsorbent material consisting of paper impregnated with a moisture adsorbent and having a predetermined planar shape, heating said adsorbent material to drive off moisture therefrom, providing a plastic porous material having a controlled water vapor transmission rate, and conforming said plastic porous material to said predetermined planar shape and in completely sealed relationship thereto to produce said controlled rate adsorbent unit.
2. A method as set forth in claim 1 including the step of storing said controlled rate adsorbent unit in a moisture barrier package.
3. A method as set forth in claim 1 including the step of applying a humidity indicating material to said paper prior to sealing said adsorbent material in said porous material.
4. A controlled rate adsorbent unit for placement into a recording disc package in which recording discs are being stored comprising a sheet of paper impregnated with a moisture adsorbent, and plastic film casing means of porous material conforming to and completely encasing said sheet of paper and sealing said sheet of paper therein, said casing means having a predetermined water vapor transmission rate for controlling the water vapor adsorption rate of said moisture adsorbent so that exposure of said controlled rate adsorbent unit to high humidity atmospheric conditions will not prevent said adsorbent unit from remaining active for prolonged periods of time, and said adsorbent unit being substantially in the shape of a recording disc.
5. A controlled rate adsorbent unit as set forth in claim 4 including a humidity indicator on said sheet of paper.
6. A controlled rate adsorbent unit as set forth in claim 5 wherein said plastic film is transparent to permit viewing of said humidity indicator therethrough.
7. In combination: a package, recording disc means in said package, and a controlled rate adsorbent unit in said package for adsorbing water vapor in said package at a controlled rate for maintaining the quality of said recording disc means, said controlled rate adsorbent unit being in the shape of a recording disc, said adsorbent unit including paper impregnated with a moisture adsorbent and completely encased and sealed within a plastic casing having a predetermined vapor transmission rate.
8. The combination set forth in claim 7 wherein said package is fabricated of moisture barrier material.
CA000611884A 1989-08-09 1989-09-19 Controlled rate adsorbent unit and method of fabrication thereof Expired - Fee Related CA1322178C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US391,775 1989-08-09
US07/391,775 US5009308A (en) 1989-08-09 1989-08-09 Controlled rate adsorbent unit and method of fabrication thereof

Publications (1)

Publication Number Publication Date
CA1322178C true CA1322178C (en) 1993-09-14

Family

ID=23547888

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000611884A Expired - Fee Related CA1322178C (en) 1989-08-09 1989-09-19 Controlled rate adsorbent unit and method of fabrication thereof

Country Status (3)

Country Link
US (1) US5009308A (en)
CA (1) CA1322178C (en)
GB (1) GB2234688B (en)

Families Citing this family (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5356678A (en) * 1989-04-24 1994-10-18 American Colloid Company Pouch for absorbing fluid
US5143617A (en) * 1990-12-20 1992-09-01 Abbott Laboratories In-line moisture filter usable in an improved packaging system for a sterilizable calibratable medical device
JP2557818Y2 (en) * 1992-04-28 1997-12-17 三菱瓦斯化学株式会社 Apparatus for fixing small bags in hot melt adhesive
US5364577A (en) * 1993-03-23 1994-11-15 Whirlpool Corporation Vacuum panel manufacturing process
CA2143409A1 (en) * 1994-02-28 1995-08-29 Yoshikazu Morita Securing small bags to belt-like member
US5624478A (en) * 1995-09-14 1997-04-29 Patapanian; Edward Ethylene absorption device
US5846696A (en) * 1995-10-13 1998-12-08 Eastman Kodak Company Blends of polymer and zeolite molecular sieves for packaging inserts
US5789044A (en) * 1996-01-24 1998-08-04 Eastman Kodak Company Zeolite molecular sieves for packaging structures
US5542191A (en) * 1995-10-25 1996-08-06 Shouse Financial Corporation Footwear drying insert
US5644899A (en) * 1995-12-26 1997-07-08 Motorola, Inc. Method for packaging semiconductor components for shipment
US5743942A (en) * 1996-09-19 1998-04-28 United Catalysts Inc. Desiccant container
US5876487A (en) * 1997-03-17 1999-03-02 Donaldson Company, Inc. Adsorbent construction; and, method
US6143058A (en) * 1997-03-17 2000-11-07 Donaldson Company, Inc. Adsorbent construction and method
US5938012A (en) * 1997-03-19 1999-08-17 Innoflex, Incorporated Storage bag with moisture emitting pad
US6000198A (en) * 1998-04-07 1999-12-14 Calgon Carbon Corporation Method and package for packaging contents at reduced pressures
US6131368A (en) * 1998-04-07 2000-10-17 Calgon Carbon Corporation Method for packaging adsorbents
US6110260A (en) * 1998-07-14 2000-08-29 3M Innovative Properties Company Filter having a change indicator
US6168651B1 (en) * 1998-10-08 2001-01-02 Donaldson Company, Inc. Filter assembly with shaped adsorbent article; and devices and methods of use
US6146446A (en) * 1998-10-08 2000-11-14 Donaldson Company, Inc. Filter assembly with shaped adsorbent article; and devices and methods of use
US6338234B1 (en) * 1999-11-24 2002-01-15 Weyerhauser Company Method of encapsulating shipping container blanks in plastic film
IL158358A0 (en) 2001-06-08 2004-05-12 Donaldson Co Inc Adsorption element and methods
US20050092176A1 (en) * 2001-06-08 2005-05-05 Lefei Ding Adsorptive filter element and methods
US6997977B2 (en) * 2002-07-31 2006-02-14 Donaldson Company, Inc. Adsorptive duct for contaminant removal, and methods
US20040069146A1 (en) * 2002-07-31 2004-04-15 Carter Steven Alan Adsorptive duct for contaminant removal, and methods
FR2843042B1 (en) * 2002-08-02 2004-10-15 Rexam Sps DEVICE FOR CONTROLLED ADSORPTION OF MOISTURE
US7243788B2 (en) * 2003-10-22 2007-07-17 Kimberly-Clark Worldwide, Inc. Package for segregating and mixing substances
US6986807B2 (en) * 2004-02-06 2006-01-17 Brunk S Fred Desiccant bottle cap
US7384497B2 (en) * 2004-06-29 2008-06-10 Weyerhaeuser Company Process for encapsulation of cellulose based substrates using electromagnetic radiation heating
US20070151685A1 (en) * 2004-06-29 2007-07-05 Weyerhaeuser Co. Cellulose-based substrates encapsulated with polymeric films and adhesive
US7247216B2 (en) * 2004-06-29 2007-07-24 Weyerhaeuser Co. Process for encapsulation of cellulose based substrate using non-electromagnetic heating
US20050284564A1 (en) * 2004-06-29 2005-12-29 Horsfield Brian C Process for encapsulation of cellulose based substrates using adhesive
US20050287321A1 (en) * 2004-06-29 2005-12-29 Horsfield Brian C Cellulose based substrates encapsulated with polymeric films and adhesive
US7870992B2 (en) 2005-06-29 2011-01-18 International Paper Co. Container with freestanding insulating encapsulated cellulose-based substrate
US7624911B2 (en) * 2005-06-29 2009-12-01 International Paper Co. Container with freestanding insulating encapsulated cellulose-based substrate
US20070020414A1 (en) * 2005-07-21 2007-01-25 Sud-Chemie Inc., Absorbent article
US20070086924A1 (en) * 2005-10-18 2007-04-19 Drummond Scientific Company Pipette with contamination indicator
US20070157702A1 (en) * 2006-01-10 2007-07-12 Masatami Hamada Humidity indicator labels
FR2916357B1 (en) * 2007-05-24 2009-09-04 Sterlab Soc Par Actions Simpli METHOD AND DEVICE FOR REDUCING LIQUID WATER IN CONTAINERS WHEN STERILIZING EQUIPMENT WITH WATER VAPOR.
US20080314772A1 (en) * 2007-06-19 2008-12-25 Humidipak, Inc. Humidity control for long term storage of articles
US9458451B2 (en) 2007-06-21 2016-10-04 Gen-Probe Incorporated Multi-channel optical measurement instrument
DE602008002811D1 (en) * 2008-02-01 2010-11-11 Hsu Tsung Han Regenerable dehumidifying bag
DE202010004909U1 (en) * 2010-04-12 2011-08-05 Absortech International Ab Device for moisture absorption
JP5575536B2 (en) * 2010-05-06 2014-08-20 富士フイルム株式会社 Recording tape cartridge packaging method and package
US8861127B2 (en) 2011-08-17 2014-10-14 HGST Netherlands B.V. Magnetic storage device with dynamic humidity control system to mitigate water vapor transients
US8867164B2 (en) 2011-08-17 2014-10-21 HGST Netherlands B.V. Magnetic storage device with humidity control device incorporating a differentially permeable membrane
US8885289B2 (en) 2011-08-17 2014-11-11 HGST Netherlands B.V. Magnetic storage device with multi-functional component for controlling chemical and water vapor therein
US9579626B1 (en) 2011-12-01 2017-02-28 Scentlok Technologies, Inc. Systems and methods for controlling odor
US9522207B1 (en) 2011-12-01 2016-12-20 Scentlok Technologies, Inc. Systems and methods for controlling odor
US9815015B2 (en) * 2012-09-26 2017-11-14 Dry Air Solutions, Llc Method of synergistic desiccation
WO2014062307A1 (en) 2012-10-17 2014-04-24 Spencer & Associates Publishing Ltd. Evaluation of output-producing asset productivity
US9114349B2 (en) * 2012-10-26 2015-08-25 Donaldson Company, Inc. Controlled moisture vapor transmission filter assembly for electronic enclosures
TW201532903A (en) * 2014-02-27 2015-09-01 High Chance Worldwide Ltd Shoes packaging assembly with transparent mildew-proof bag
US9302795B1 (en) 2015-05-13 2016-04-05 Seagate Technology Llc Humidity control for enclosure
GB2543089B (en) * 2015-10-09 2020-04-29 Mohan Instrumentation Services Ltd Rail Mounting Desiccant Unit

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB207133A (en) * 1923-02-22 1923-11-22 Paul Snyder Moyer Improvements in lids or closures for containers
GB207097A (en) * 1923-02-22 1923-11-22 Paul Snyder Moyer Improvements in lids or closures for containers
GB317933A (en) * 1928-06-06 1929-08-29 Harry Periam Improvements in or relating to closures for containers
GB543979A (en) * 1939-12-19 1942-03-23 Stokes Machine Co Improvements in or relating to the packaging and preservation of dried materials
GB579094A (en) * 1944-05-26 1946-07-23 Gen Motors Corp Improvements relating to desiccants
US3990872A (en) * 1974-11-06 1976-11-09 Multiform Desiccant Products, Inc. Adsorbent package
JPS5411890A (en) * 1977-06-30 1979-01-29 Shintouhoku Kagaku Kougiyou Kk Dew adsorbent
JPS55119418A (en) * 1979-03-06 1980-09-13 Daishiro Fujishima Gas adsorption sheet
DE3135025A1 (en) * 1981-09-04 1983-03-24 Collo Gmbh, 5303 Bornheim METHOD FOR PRODUCING A SORPTIVELY ACTIVE BODY, IN PARTICULAR TO REMOVE ODORS, FOR ROOM EQUIPMENT AND THE LIKE.
JPS58130473A (en) * 1982-01-29 1983-08-03 Toshiba Corp Containing case of information recording medium
US4433024A (en) * 1982-07-23 1984-02-21 Minnesota Mining And Manufacturing Company Reduced-stress vapor-sorptive garments
JPS5926475A (en) * 1982-08-02 1984-02-10 日本曹達株式会社 Package for dehumidification
JPS58199020A (en) * 1982-12-29 1983-11-19 Shin Nisso Kako Co Ltd Packed product for dehumidification
DE3339642A1 (en) * 1983-10-31 1985-05-15 Kaubek, Fritz, Dipl.-Ing. DRYING ELEMENTS AND METHOD FOR USE THEREOF
JPS619880A (en) * 1984-06-22 1986-01-17 Mitsubishi Electric Corp Container for magnetic disk
GB2173478A (en) * 1985-02-20 1986-10-15 Ryford Ltd Container for flat articles
US4614528A (en) * 1985-06-24 1986-09-30 System Development Corp. Dry air breather assembly
DE3524431A1 (en) * 1985-07-09 1987-01-22 Knecht Filterwerke Gmbh PLATE-SHAPED FILTER INSERT
US4654057A (en) * 1986-04-01 1987-03-31 Rhodes Barry V Dehumidifier
JPS643529A (en) * 1987-06-25 1989-01-09 Kazuhiro Date Method for measuring internal stress of solid by photoelasticity
US4830643A (en) * 1988-07-13 1989-05-16 W. L. Gore & Associates, Inc. Expanded polytetrafluoroethylene tubular container
US4860887A (en) * 1988-07-22 1989-08-29 Fosse Daniel K Method of forming packaging and packaging structure in accordance with the method
US4940621A (en) * 1988-09-19 1990-07-10 Clean-Pak, Inc. Absorbent pad and method for constructing same

Also Published As

Publication number Publication date
GB2234688B (en) 1993-11-03
US5009308A (en) 1991-04-23
GB9015366D0 (en) 1990-08-29
GB2234688A (en) 1991-02-13

Similar Documents

Publication Publication Date Title
CA1322178C (en) Controlled rate adsorbent unit and method of fabrication thereof
US5148337A (en) Controlled rate adsorbent and disc drive stabilizing unit
US5500038A (en) Non-particulating compact adsorbent filter
US5069694A (en) Packet for compound treatment of gases
US6726745B2 (en) Filter assembly with shaped adsorbent article; and devices and methods of use
US6146446A (en) Filter assembly with shaped adsorbent article; and devices and methods of use
US4830643A (en) Expanded polytetrafluoroethylene tubular container
US6214095B1 (en) Adsorbent pouch for removal of gaseous contaminants
EP1369173B1 (en) Moisture absorbent unit and semi-sealed container
EP0593076B1 (en) Method for improving the archival properties of processed photographic film in a storage assembly for achieving the same
WO1998041989A1 (en) Adsorbent construction and method
US20020134239A1 (en) Contaminant removal in enclosed spaces
US5191721A (en) Microwave regenerable desiccant cartridge
US4455796A (en) Insulating glass unit and spacer bar therefor
WO2005094987B1 (en) Shaped composite adsorbent material
JPH06278775A (en) Film roll wrapping method and film roll wrapped thereby
CN107185353B (en) Controlled water vapor transmission filter assembly for electronics enclosures
CA2182924C (en) Archival preservation coatings and adhesives
JPH04225775A (en) Vacuum heat insulating panel
WO2001041901A1 (en) Adsorbent assembly comprising polypropylene filtering layer for removing gaseous contaminants
JP4007701B2 (en) Gas adsorption filter
JP2024064266A (en) Adsorption member, its manufacturing method and vacuum insulation material
JPS5996380A (en) Composite layered glass window
JPS629364B2 (en)
JPS5816530Y2 (en) storage container

Legal Events

Date Code Title Description
MKLA Lapsed